Oil-groove-cutting attachment for key-seating machines.



Patented May 7, 1912.

ATTORNEY P. S. MITTS.

cf. mvemon OIL GROOVE CUTTING ATTACHMENT FOR KEY EATING MACHINES.

APPLICATION FILED SEPT. 16, 1911.

COLUMBIA PLANOGRAPH CD" WASHINGTDN, D. C'

UNITED STATES PATENT OFFICE.

PHILIP S. MITTS, 0F SAGINAW', MICHIGAN.

OIL-GROOVE-CUTTING- ATTACHMENT FOR KEY-SEATING- MACHINES.

To all whom it may concern new and useful Improvements Groove-GuttingAttachments for Key-Seating Machines; and I do hereby declare the.following to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it Theimprovement pertains more particu.

larly to a device adapted to be attached to key-seating machines of thetype in which the cutting tool travels through a vertical stroke.

The particular object of my present improvement is to provide in such akey-seating machine means whereby, during the vertical stroke of thecutting tool, the tool is projected laterally into the work during apart only of the down-stroke of the tool so that the groove or score cutby the tool does not extend the full length of the bore of the piecebeing operated upon, but begins at any desired distance from one end ofthe bore, and terminates before the tool reaches the other end of thebore.

My improved device also embodies means for gradually feeding the toolinto the work at the beginning of the cut and to gradually Withdraw ittoward the end of the cut, so that the two extremities of the finishedgroove taper out gradually, instead of extending clear through from endto end of the bore, as is the case with an ordinary key-seating machinehaving no means such as will be described in this specification, forgradually feeding the tool forward and gradually retracting it duringthe downward stroke of the tool.

My improvement also provides means for varying the length of the grooveand for varying its location with respect to the ends of the hub.

With these and certain other objects in Specification of Letters Patent.

Application filed September 16, 1911.

Patented May '7, 1912.

Serial No. 649,769.

view which will appear later in the speci- Be it known that I, PHILIP SMrr'rs, a. citizen of the United States, residing at Saginaw, in thecounty of Saginaw and State of Michigan, have invented cergiin,

in ilfication, my invention consists in the devices to be described andclaimed, and the equivalents thereof.

In the drawings forming a part of the specification, Figure 1 is a sideview broken away in part, showing a hub having an internal oil groovesuch as is produced by a key-seater equipped with my improvement; Fig. 2is a part vertical sectional view of a keyseater with my improvementattached; and Fig. 3 is a perspective view showing the upper ends of thecutting tool, the feed wedge bar, and the toolfeeding bar.

As is well known, the ordinary key-seating machine comprises a frame 1which carries a vertical post 2 and is provided with a verticallymovable tool bar 8.

In the particular type of key-seater to which my present invention isespecially adapted, there is' also provided a vertically movable feedingwedge bar 4:. The tool bar 3 is equipped with a cutting tool 5 at itsupper end and is adapted to be reciprocated up and down by any suitabledriving mechanism.

A rack or cross-head 13, actuated up and down by a pinion 14 ispreferably employed to impart the required movement to the cutting tool,the connections between crosshead 13 and the cutter bar being of usualconstruction and well known in the art. It will, however, be understoodthat as the cutting tool 5 of the ordinary key-seating machine movesdownward, it is backed by the wedge 6 at the upper end of the wedge bari. While the tool 5 is at the upper end of its travel, the wedge 6 isfirst drawn down slightly, forcing the tool 5 laterally away from post 2to feed it into the Work. Tool 5 and wedge 6 then travel down to thebottom of the stroke, after which wedge 6 is slightly raised, allowingtool 5 to draw back slightly out of the cut and giving it clearance onthe up-stroke. At the beginning of any succeeding down-stroke, the wedge6 is fed downfarther, feeding the tool 5 still farther into the work andgiving it the proper feed for the second cut. It will be noted, however,that such a key-seating device is capable only of cutting a key-seatthroughout the entire length of the bore of the hub, so that the ends ofthe key-seat are open. In many classes of work, as for instance in thefitting up of wheels which are to run loose on their shafts, itisdesirable to provide internal oil grooves that do not extend the entirelength of the hub, but terminate short of the ends. To accomplish thisresult it is essential that the forward feed of the cutting tool beproduced in the same manner as has just been described, that is, by theproper operation of the wedge 6, but in addition it is also necessary topro vide an independent means by which the tool 5 may be thrown forwardafter it has completed the first part of its travel down the bore of thehub, and that means shall also be provided for withdrawing the toolbefore it has traveled completely through the hub.

My improvement, therefore, embodies means for throwing the tool forwardduring a part of its stroke in the manner above indicated. The means bywhich this is accomplished is illustrated in Figs. 2 and 8, in which 7is a cam plate beveled at its upper and lower ends, as indicated at 8.This cam plate is secured to the post 2 in any suitable manner, as byscrews or bolts 9. At the back of wedge 6 is provided a bar 10 which isvertically movable and is connected at its lower end to tool bar 3, soas to move up and down simultaneously with the cutting tool 5. At theback of bar 10 is a suitable projection 11 adapted to ride over the ends8 and along the face of the plate 7 as indicated in Fig. 2.

In practice I prefer to locate projection '11 in the rear of but veryslightly below the cutting point of tool 5, so that the rearward thrustof the cutting tool will be transmitted directly through projection 11to the plate 7. The vertically movable feed wedge bar 4 with its wedge 6is interposed between the tool bar 3 and the backing bar 10, so thatvertical adjustment of the wedge 6 may be had in the same manner as isnow common in key-seating machines.

It will be understood that at the commencement of the down-stroke oftool 5, wedge 6 is drawn down a distance corresponding to the desiredfeed to be given to the tool 5, and tool 5, wedge 6 and bar 10 with itsprojection 11 then travel down simultaneously until projection 11encounters the beveled end 8 of plate 7 when bar 10, wedge 6 and tool 5are projected outwardly and tool 5 takes into the work, cutting on itsdown-stroke until the lower bevel 8 of plate 7 is reached and the toolgradually withdraws from the work. The form of groove thus cut isindicated at 12 in Fig. 1, in which it will be noticed that thecompleted groove has gradually tapered ends that do not extend to theends of the piece in which the groove is cut.

In practice I prefer to provide a number of plates 7 which may beinterchangeably secured to the post 2, the plates being of differentlengths, and if desired, of different faced contour in order to cutgrooves of difierent lengths. By tapering the working face of plate 7,the bottom of groove 12 may be tapered if desired, or various shapes maybe imparted to the groove by properly shaping the face of plate 7. Theline of travel of the point of the cutting tool 5 when acted upon byplate 7 is indicated by dotted lines in Fig. 3.

By the means above described I have produced a simple, yet inexpensiveattachment that can be applied to existing key-seating machines, wherebyit is possible to cut a variety of grooves of different kinds in theinterior surface of a hub, the ends of the grooves not extending to theends of the hub.

The work can be done with extreme rapidity and accuracy.

While I have shown and described the device as applied particularly tothe cutting of concealed oil grooves in the interior of hubs, it will beunderstood that this example was selected for purpose of explanationonly and that the machine is capable of a wide range of uses which willbe apparent to the users of such machines.

Having described my invention, what I claim and desire to secure byLetters Patent, 1s:-

1. In combination with a key-seating ma chine having a verticallymovable cuttin tool, a vertical post adjacent said tool, an means foractuating said tool lengthwise said post, and for feeding itprogressively into the work, means for projecting said tool forwardduring the middle portion of its cutting stroke, said means comprising aplate formed with tapered ends and removably mounted on the face of saidpost and at the rear of the middle portion of the travel of the cuttingtool, and a projecting member located between the cutting tool and saidplate, and adapted to travel with the cutting tool, said projectingmember adapted to engage the working face of said plate.

2. In combination with a key-seating machine having a vertically movablecutting tool, a vertical post adjacent said tool, and means foractuating said tool and for feeding it progressively into the work;independent means for projecting said tool forward during the middleportion of its cutting stroke, said means comprising a cam plateremovably secured to the face of said post, and a vertically movablebacking bar located at the rear of said cutting tool and having arearward projection slidingly engaging the face of said cam plate.

3. In a key-seating machine, the combination with a vertically movabletool-carrying bar and a vertically movable feeding wedge bar having awedge at its upper end, and means for actuating said bars, of astationary vertical post, a cam plate remov- In testimony whereof, Iaiiix my signature ably secured to said postkadjacent said tool, inpresence of tWo Witnesses. a Vertically mova le bac ing bar secured tosaid tool-carrying bar said backing bar PHILIP MITTS' 1 formed With aprojection adapted to engage Witnesses: i said cam plate during aportion only of th CHRISTINE A. BRAIDEL, vertical travel of said backingbar. G120. W. SMITH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

